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Author (up) Zabiliute, A.; Vaicekauskas, R.; Vitta, P.; Zukauskas, A. url  openurl
  Title Phosphor-converted LEDs with low circadian action for outdoor lighting Type Journal Article
  Year 2014 Publication Optics Letters Abbreviated Journal Opt Lett  
  Volume 39 Issue 3 Pages 563-566  
  Keywords LED; light emitting diode; phosphor conversion; firelight; circadian disruption  
  Abstract Dichromatic phosphor-converted (pc) light-emitting diodes (LEDs) with low circadian action are proposed for low-luminance photobiologically safe outdoor illumination. The LEDs feature the partial conversion of blue radiation in an orange phosphor with the resulting correlated color temperature in the “firelight” range of 1700-2500 K. The circadian action factor, which is the ratio of the biological efficacy of radiation due to the excitation of intrinsically photosensitive retinal ganglion cells to the mesopic luminous efficacy of radiation, is considerably lower than that of commercial white pc LEDs. The equivalent general color-rendering index estimated with regard to the reduced color-discrimination ability of human vision at low luminances has appropriate values in between those of common white pc LEDs and high-pressure sodium lamp.  
  Address Institute of Applied Research, Vilnius University, Saulėtekio al. 9, bldg. III, LT-10222 Vilnius, Lithuania  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0146-9592 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:24487866 Approved no  
  Call Number IDA @ john @ Serial 283  
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